Switch //components away from base::ListValue::Append(Value*) overload.

components/cloud_devices/common/printer_description.cc

Index: components/cloud_devices/common/printer_description.cc
diff --git a/components/cloud_devices/common/printer_description.cc b/components/cloud_devices/common/printer_description.cc
index a5e03a0999ee9d6eb8c0662df369b59c5b3c4828..aa7fa38d51703e856414027737298b3f82dbc37b 100644
--- a/components/cloud_devices/common/printer_description.cc
+++ b/components/cloud_devices/common/printer_description.cc
@@ -7,6 +7,8 @@
 #include <stddef.h>
 
 #include <algorithm>
+#include <memory>
+#include <utility>
 
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
@@ -734,11 +736,12 @@ class PageRangeTraits : public ItemsTraits<kOptionPageRange> {
       base::ListValue* list = new base::ListValue;
       dict->Set(kPageRangeInterval, list);
       for (size_t i = 0; i < option.size(); ++i) {
-        base::DictionaryValue* interval = new base::DictionaryValue;
-        list->Append(interval);
+        std::unique_ptr<base::DictionaryValue> interval(
+            new base::DictionaryValue);
         interval->SetInteger(kPageRangeStart, option[i].start);
         if (option[i].end < kMaxPageNumber)
           interval->SetInteger(kPageRangeEnd, option[i].end);
+        list->Append(std::move(interval));
       }
     }
   }